package m3d28;

import java.util.Objects;

public class kObject {
    public static void main(String[] args) {
        method(null);
    }

    public static void method(Object obj) {
        //调用o类的犯法判断是否为空
        //ke不加字符串
        Objects.requireNonNull(obj, "kongle");
    }
}
